MailController.cs

// Copyright (c) Microsoft. All rights reserved. Licensed under the MIT license. See full license at the bottom of this file.
using Microsoft.Office365.OutlookServices;
using O365_APIs_Start_ASPNET_MVC.Helpers;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Web.Mvc;
using model = O365_APIs_Start_ASPNET_MVC.Models;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.OpenIdConnect;
using System.Web;
using Microsoft.IdentityModel.Clients.ActiveDirectory;

namespace O365_APIs_Start_ASPNET_MVC.Controllers
{
    //Read, send, and delete email.
    [Authorize]
    [HandleError(ExceptionType = typeof(AdalException))]
    public class MailController : Controller
    {
        private MailOperations _mailOperations = new MailOperations();
        
        private static bool _O365ServiceOperationFailed = false;  

        //Returns the user's email
        //Implements Office 365-side paging
        // GET: /Mail/
        public async Task<ActionResult> Index(int? page)
        {
            ViewBag.O365ServiceOperationFailed = _O365ServiceOperationFailed;

            if (_O365ServiceOperationFailed)
            {
                _O365ServiceOperationFailed = false;
            }

            var pageNumber = page ?? 1;

            if (page < 1)
            {
                pageNumber = 1;
            }

            //Number of events displayed on one page. Edit pageSize if you like
            int pageSize = 10;

            List<model.MailItem> mailMessages = new List<model.MailItem>();
            
            try
            {
                mailMessages = await _mailOperations.GetEmailMessages(pageNumber, pageSize);
            }
            catch (AdalException e)
            {

                if (e.ErrorCode == AdalError.FailedToAcquireTokenSilently)
                {

                    //This exception is thrown when either you have a stale access token, or you attempted to access a resource that you don't have permissions to access.
                    throw e;

                }

            }
           
            //Store these in the ViewBag so you can use them in the Index view
            ViewBag.Page = pageNumber;
            ViewBag.NextPage = pageNumber + 1;
            ViewBag.PrevPage = pageNumber - 1;
            ViewBag.LastPage = false;

            if ((mailMessages != null) && (mailMessages.Count == 0))
            {
                ViewBag.LastPage = true;
            }

            ViewBag.NoItemsinService = false;
            if ((mailMessages.Count == 0) && (pageNumber == 1))
            {
                ViewBag.NoItemsinService = true;
            }
            return View(mailMessages);
        }

        //
        // GET: /Mail/Create
        public ActionResult Create()
        {
            return View();
        }

        //
        // POST: /Mail/Create
        [HttpPost]
        public async Task<ActionResult> Create(FormCollection collection)
        {
            _O365ServiceOperationFailed = false;
            String newEventID = "";

            try
            {
                newEventID = await _mailOperations.ComposeAndSendMailAsync(collection["Subject"], collection["Body"], collection["Recipients"]);
            }
            catch (Exception)
            {
                _O365ServiceOperationFailed = true;
            }
            
            return RedirectToAction("Index", new { newid = newEventID });
        }

        // GET: /Mail/Delete/5
        public async Task<ActionResult> Delete(string id)
        {
            model.MailItem mailItemToDelete = await _mailOperations.GetMailItemByIDsAsync(id);
            return View(mailItemToDelete);
        }

        //
        // POST: /Mail/Delete/5
        [HttpPost]
        public async Task<ActionResult> Delete(string id, FormCollection collection)
        {
            _O365ServiceOperationFailed = false;
            
            try
            {
                await _mailOperations.DeleteMailItemAsync(id);
            }
            catch (Exception)
            {
                _O365ServiceOperationFailed = true;
            }
            return RedirectToAction("Index");
        }
    }
}
//*********************************************************  
//  
//O365 APIs Starter Project for ASPNET MVC, https://github.com/OfficeDev/Office-365-APIs-Starter-Project-for-ASPNETMVC
// 
//Copyright (c) Microsoft Corporation 
//All rights reserved.  
// 
//MIT License: 
// 
//Permission is hereby granted, free of charge, to any person obtaining 
//a copy of this software and associated documentation files (the 
//""Software""), to deal in the Software without restriction, including 
//without limitation the rights to use, copy, modify, merge, publish, 
//distribute, sublicense, and/or sell copies of the Software, and to 
//permit persons to whom the Software is furnished to do so, subject to 
//the following conditions: 
// 
//The above copyright notice and this permission notice shall be 
//included in all copies or substantial portions of the Software. 
// 
//THE SOFTWARE IS PROVIDED ""AS IS"", WITHOUT WARRANTY OF ANY KIND, 
//EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
//MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
//NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 
//LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
//OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
//WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
//  
//*********************************************************